Battery, power consumption apparatus, and method for producing battery

ABSTRACT

The present application provides a battery, a power consumption apparatus, and a method for producing a battery. The battery includes a box body, a battery module and a mounting plate, the battery module is disposed in the box body and includes a battery cell arrangement structure and a first end plate, the battery cell arrangement structure includes a plurality of battery cells stacked and is disposed on one side of the battery cell arrangement structure, the first end plate is fixedly connected to the battery cell arrangement structure, the mounting plate is disposed between the first end plate and the box body and is fixedly connected to the box body; the first end plate has a first elastic support part configured to be capable of abutting the mounting plate, being squeezed by the battery cell arrangement structure and deforming when the battery cell arrangement structure expands.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Application No.PCT/CN2020/135944, filed on Dec. 11, 2020, the disclosure of which ishereby incorporated by reference in its entirety.

TECHNICAL FIELD

The present application relates to the field of battery technologies,and in particular, to a battery, a power consumption apparatus, and amethod for producing a battery.

BACKGROUND

In the prior art, locking with a bolt is used between a battery moduleand a box body of a battery, so that the battery module and the box bodyare rigidly connected. During expansion of the battery module, the boxbody may deform under the action of an expansion force, resulting indeformation of the battery box and an increase in contour dimension ofthe battery box body, and affecting assembly and the service life of thebattery. Moreover, battery cells are squeezed by an inner wall of thebox body during the expansion, and a phenomenon of lithium plating mayoccur, resulting in a dive of battery capacity.

SUMMARY

Embodiments of the present application are intended to provide abattery, a power consumption apparatus, and a method for producing abattery. In this battery, expansion space could be provided for abattery module, and a box body does not easily deform.

In a first aspect, an embodiment of the present application provides abattery. The battery includes a box body, a battery module and amounting plate, the battery module is disposed in the box body andincludes a battery cell arrangement structure and a first end plate, thebattery cell arrangement structure includes a plurality of battery cellsstacked along a first direction, the first end plate is disposed on oneside of the battery cell arrangement structure, the first end plate isfixedly connected to the battery cell arrangement structure, themounting plate is disposed between the first end plate and the box body,and the mounting plate is fixedly connected to the box body; and thefirst end plate has a first elastic support part, and the first elasticsupport part is configured to be capable of abutting the mounting plate,being squeezed by the battery cell arrangement structure and deformingwhen the battery cell arrangement structure expands to provide expansionspace for the battery cell arrangement structure.

In the foregoing technical solution, the first elastic support partprovides the expansion space through its own deformation, and thedeformation is reliable, which could provide the expansion space for thebattery cell arrangement structure in time (that is, the expansion spaceis provided for the battery module) to release an expansion force of thebattery cell arrangement structure, could reduce possibility ofdeformation of the box body caused by the expansion force, and improvesreliability of assembly and the service life of the box body. Meanwhile,by releasing the expansion force, possibility of occurrence of lithiumplating in the battery cells caused by an excessive squeezing forcebetween the mounting plate and the first end plate could be reduced,which is beneficial to normal operation of the battery.

In addition, due to the provision of the mounting plate, it is benefitfor adding a molding manner of the box body. For example, by providingthe mounting plate, the box body may be molded by means of a die-castingprocess. By reasonably designing a structure of the mounting plate andarranging its position on the box body, it is benefit for offsetting adraft angle of the box body to facilitate construction of a restraintstructure between the battery module and the box body, so as to realizerestraint of the battery module in the box body.

Optionally, the box body includes a first wall and a second wall, thesecond wall is connected to the first wall and extends upward, thebattery module is located above the first wall, and the mounting plateis disposed between the first end plate and the second wall.

In the foregoing technical solution, the expansion space is providedbetween the first end plate and the mounting plate for the battery cellarrangement structure through the deformation of the first elasticsupport part, which could reduce a squeezing force of the battery moduleto the second wall of the box body.

Optionally, the mounting plate is connected to the second wall through afirst fastener to fix the mounting plate to the box body.

Optionally, a restraint groove with an opening facing upward is disposedin the box body, and a lower end of the mounting plate is plugged intothe restraint groove.

In the foregoing technical solution, the lower end of the mounting plateis restrained in the box body, which improves reliability of theconnection between the mounting plate and the box body.

Optionally, a restraint member is disposed in the box body, therestraint member has an upright part, and the restraint groove isrestricted between the upright part and the second wall.

Optionally, the mounting plate includes a mounting plate body and afirst extending part, the first extending part extends from the mountingplate body toward the second wall, and the first extending part isfixedly connected to the second wall.

In the foregoing technical solution, by providing the first extendingpart, it facilitates the connection between the mounting plate and thesecond wall. In addition, due to the provision of the first extendingpart, the mounting plate body could be connected to the second wallthrough the first extending part when arranged in an upright direction.In this way, a draft angle of the second wall could be offset, and theconnection between the mounting plate and the box body is convenientlyrealized.

Optionally, the first extending part is fixedly connected to an uppersurface of the second wall to facilitate operation and be benefit forsimplifying the connection structure therebetween.

Optionally, the mounting plate further includes a second extending part,the second extending part extends from the mounting plate body towardthe second wall and abuts the second wall, and the second extending partand the first extending part are spaced apart in an up-down direction.

In the foregoing technical solution, by providing the second extendingpart, connection points between the mounting plate and the second wallin the up-down direction are increased, and reliability of theconnection between the mounting plate and the second wall is improved.

Optionally, rigidity of the mounting plate is greater than rigidity ofthe first end plate, so that when the battery cell arrangement structureexpands, the first end plate easily deforms to provide expansion spacefor the battery module. Meanwhile, the rigidity of the mounting platemeets the requirements, which plays a role in reliably mounting thebattery module in the box body.

Optionally, the mounting plate is made of a metal material, and thefirst end plate is made of a non-metal material.

Optionally, a height of the mounting plate is not smaller than a heightof the battery cell arrangement structure, and the height of themounting plate is greater than a height of the second wall.

Optionally, the battery further includes a second end plate, the secondend plate is disposed opposite to the first end plate along the firstdirection, the battery cell arrangement structure is located between thefirst end plate and the second end plate, and the second end plate isfixedly connected to both the battery cell arrangement structure and thebox body.

In the foregoing technical solution, deformation space is providedbetween one end of the battery module in the first direction and the boxbody through the first elastic support part, and the other end of thebattery module in the first direction is rigidly connected to the boxbody. When the battery cell arrangement structure expands, it expandstoward one end at which the first end plate is located, the batterymodule could expand in a preset direction while the release of theexpansion force of the battery cell arrangement structure is realized,and squeeze and deformation of a side wall of the box body at the otherend of the battery module could be avoided at the same time.

Optionally, rigidity of the second end plate is greater than rigidity ofthe first end plate, so that when the battery cell arrangement structureexpands, the second end plate does not easily deform, the first endplate easily deforms, and the battery module expands toward the firstend plate more easily.

Optionally, the second end plate is made of a metal material, and thefirst end plate is made of a non-metal material.

Optionally, at least a portion of the first elastic support partobliquely extends upward toward the mounting plate.

In the foregoing technical solution, when the first end plate issqueezed, since the first elastic support part has an inclined angle,the first elastic support part deforms more easily when squeezed by themounting plate, which could provide the expansion space for the batterycell arrangement structure in time.

Optionally, the first end plate further includes an end plate body, theend plate body has a first surface facing the battery cell arrangementstructure and a second surface facing away from the battery cellarrangement structure, and the first elastic support part is disposed onthe second surface.

In the foregoing technical solution, the second surface is a large faceof the end plate body, which facilitates the provision of the firstelastic support part. In addition, since the second surface is a largeface, it facilitates arrangement of more first elastic support parts,which is benefit for dispersing the expansion force of the battery cellarrangement structure, and reduces the possibility of occurrence oflithium plating due to squeeze of the battery cells caused byconcentration of the squeezing force.

Optionally, an orthographic projection of the first elastic support parton a horizontal plane is in a long strip shape, a face on which one longside of the long strip shape is located is connected to the secondsurface, and a face on which the other long side of the long strip shapeis located abuts the mounting plate, so as to disperse the expansionforce of the battery cell arrangement structure in a length direction ofthe first end plate.

Optionally, the first elastic support part is multiple in quantity, andthe multiple first elastic support parts are arranged at intervals onthe second surface along an up-down direction, which is benefit forevenly dispersing the expansion force, improves consistency of forcesthat positions on a face where the battery cell arrangement structure isin contact with the first end plate are subjected to, and improvesconsistency of forces that the battery cells are subjected to.

Optionally, the box body further includes a third wall, the third wallis connected to the first wall and extends upward, the third wall isdisposed opposite to the second wall along the first direction, and thefirst elastic support part abuts the mounting plate when the batterycell arrangement structure does not expand to realize locating of thebattery module in the first direction.

In the foregoing technical solution, after the battery module is mountedin the box body, the first elastic support part of the first end plateabuts the mounting plate, and the second end plate is fixedly connectedto the third wall, which could provide mounting locating in the firstdirection for the battery module, and ensures reliability of themounting of the battery module in the first direction.

Optionally, the battery module is in an interference fit with the boxbody, and the first elastic support part is configured to absorb amagnitude of interference in the first direction through generation ofelastic deformation.

In the foregoing technical solution, when the battery cell arrangementstructure does not expand, the first elastic support part abuts on themounting plate and is in a deformed stated. In addition to the advantageof providing the mounting locating in the first direction for thebattery module mentioned above, this setting has at least the followingtwo advantages: first, after the battery module is assembled in place,the first elastic support part provides an assembly margin in the firstdirection for the battery module, so that a dimension error of thebattery module in the first direction can be offset by the deformationof the first elastic support part. For example, when a dimension of thebattery module in the first direction is greater than a mountingdimension of the box body in the corresponding direction, it can berealized that the battery module is smoothly mounted in the box bodythrough the deformation of the first elastic support part. Therefore,requirements on processing and assembly accuracy of the battery modulein the first direction are reduced. Second, after the battery module isassembled in place, since the first elastic support part is in adeformed state, a reaction force of the mounting plate could betransferred to the battery cell arrangement structure. The battery cellsare subjected to a certain pressure, which is benefit for ensuring goodcontact between interfaces of positive electrode sheets and negativeelectrode sheets inside the battery cells.

Optionally, the box body further includes a pair of fourth walls, thepair of fourth walls are both connected to the first wall and extendupward, the pair of fourth walls are disposed opposite to each otheralong a second direction, and the second direction intersects with thefirst direction; and the first end plate further includes a secondelastic support part, and the second elastic support part is configuredto abut the fourth wall to realize locating of the battery module in thesecond direction.

For this reason, after the battery module is mounted in the box body,the second elastic support part abuts the fourth wall, which couldprovide mounting locating in the second direction for the batterymodule, and ensures the reliability of the mounting of the batterymodule in the second direction.

Optionally, the mounting plate is provided with a first restraint face,and the first restraint face is configured to abut the first end plateto limit the first end plate to move upward.

The first restraint face limits the first end plate to freely moveupward, which ensures mounting positions of the first end plate and thebattery module in the up-down direction (that is, a height direction ofthe first end plate), and avoids affecting normal operation of thebattery module due to the upward movement of the battery module. Forthis reason, it is possible to omit locking with a bolt between thefirst end plate and the mounting plate, which is benefit for reducingthe use of parts, and improves utilization of space inside the box body.Moreover, since locking with a bolt is omitted, the rigid connectionbetween the first end plate and the mounting plate is avoided, so thatit is possible to provide the expansion space for the expansion of thebattery module.

Optionally, a face of the mounting plate facing the first end plate ispartially recessed to form a groove, and an upper side wall of thegroove is the first restraint face.

In the foregoing technical solution, the manner of constructing thefirst restraint face through the upper side wall of the groove isbeneficial to weight reduction of the box body while the space of thebox body for accommodating the battery module is not occupied.

Optionally, the first end plate is provided with a first restraintprotrusion, and an upper surface of the first restraint protrusion isconfigured to abut the first restraint face to limit the first end plateto move upward.

In the foregoing technical solution, the manner in which the firstrestraint protrusion abuts the first restraint face for restraintrealizes that the first end plate and the mounting plate are reliablyrestrained, and compared with the manner of locking with a bolt, itfurther has the advantages of simple structure, convenient mounting ofthe battery module in the box body, and the like.

Optionally, the first restraint protrusion horizontally extends towardthe mounting plate.

In the foregoing technical solution, when the battery module expands,the direction in which the first restraint protrusion may move (upward)is perpendicular to the extending direction, so that it is not easy toslide between the first restraint protrusion and the first restraintface, which could improve reliability of restraint of the firstrestraint protrusion and the first restraint face.

Optionally, a gap is provided between the upper surface of the firstrestraint protrusion and the first restraint face in an up-downdirection when the battery cell arrangement structure does not expand.

In the foregoing technical solution, since there is a gap in the up-downdirection, the first restraint face does not interfere with thehorizontal movement of the first restraint protrusion, which is benefitfor smoothly moving the first restraint protrusion to a bottom of thefirst restraint face.

Optionally, the first end plate further includes an end plate body, theend plate body has a first surface facing the battery cell arrangementstructure and a second surface facing away from the battery cellarrangement structure, and the first restraint protrusion is disposed onthe second surface.

In the foregoing technical solution, the second surface is a large faceof the first end plate, which facilitates the provision of a secondrestraint protrusion. Moreover, since the second surface is a largeface, it facilitates arrangement of a longer second restraint protrusionalong a width direction of the first end plate to improve reliability ofrestraint of the battery module in the box body in the height direction.

Optionally, the mounting plate is further provided with a secondrestraint face, and the second restraint face is configured to abut thefirst end plate to limit the first end plate to move downward.

In the foregoing technical solution, after the battery module is mountedin the box body, possibility of excessive pressure adhesive for thebattery module could be reduced, which is benefit for ensuring that thethickness of an adhesive layer meets the requirements, thereby ensuringa bonding effect between a lower end of the battery module and the firstwall.

Optionally, an upper surface of the mounting plate is the secondrestraint face, and the existing upper surface of the second wall isused as a restraint face, which is benefit for simplifying the structureof the second wall.

Optionally, the first end plate is provided with a second restraintprotrusion, and a lower surface of the second restraint protrusion isconfigured to abut the second restraint face to limit the first endplate to move downward.

In the foregoing technical solution, the manner in which the secondrestraint protrusion abuts the second restraint face for restraint hasthe advantages of simple structure, convenient mounting of the batterymodule in the box body, and the like, while realizing that the first endplate and the box body are reliably restrained.

Optionally, a lower end of the battery cell arrangement structure isattached to the first wall, and a gap is provided between a lower end ofthe first end plate and the first wall to reduce a height of the firstend plate.

In a second aspect, an embodiment of the present application provides apower consumption apparatus, and the power consumption apparatusincludes the battery provided in the first aspect of the embodiment ofthe present application.

In a third aspect, an embodiment of the present application provides amethod for producing a battery. The method includes: providing a boxbody; providing a mounting plate; providing a battery module, thebattery module including a battery cell arrangement structure and afirst end plate, the battery cell arrangement structure including aplurality of battery cells stacked on each other, the first end platebeing disposed on one side of the battery cell arrangement structure andfixedly connected to the battery cell arrangement structure, the firstend plate having a first elastic support part, and the first elasticsupport part being configured to be capable of abutting the mountingplate, being squeezed by the battery cell arrangement structure anddeforming when the battery cell arrangement structure expands to provideexpansion space for the battery cell arrangement structure; fixedlyconnecting the mounting plate to the box body; and mounting the batterymodule in the box body, and allowing the first end plate to be locatedbetween the mounting plate and the battery cell arrangement structure.

Optionally, the battery module further includes a second end plate, thesecond end plate is disposed on one side of the battery cell arrangementstructure far away from the first end plate, and the second end plate isfixedly connected to the battery cell arrangement structure; and themounting the battery module in the box body includes: placing thebattery module in the box body, and fixedly connecting the second endplate to the box body.

Optionally, the mounting plate is provided with a first restraint face,and the first restraint face is configured to abut the first end plateto limit the first end plate to move upward; and the mounting thebattery module in the box body includes: applying a squeezing force tothe battery module to compress a length of the battery module; placingthe battery module in a compressed state in the box body; and removingthe squeezing force to restore the length of the battery module, so asto move at least a portion of the first end plate to a bottom of thefirst restraint face.

BRIEF DESCRIPTION OF DRAWINGS

In order to illustrate technical solutions in embodiments of the presentapplication more clearly, brief description will be made below toaccompanying drawings required in the embodiments. It should beunderstood that the following accompanying drawings illustrate someembodiments of the present application only, and thus should not beconsidered as limiting the scope. Other related drawings could beobtained based on these accompanying drawings by those ordinary skilledin this art without creative efforts.

FIG. 1 is a schematic diagram of a vehicle provided in an embodiment ofthe present application;

FIG. 2 is a schematic exploded view of a battery provided in anembodiment of the present application;

FIG. 3 is a schematic exploded view of a battery provided in anembodiment of the present application, where an upper cover body is notshown;

FIG. 4 is a schematic top view of a battery provided in an embodiment ofthe present application;

FIG. 5 is a schematic sectional view taken along a line A-A in FIG. 4 ;

FIG. 6 is an enlarged schematic diagram of a part B of FIG. 5 ;

FIG. 7 is a schematic diagram of a three-dimensional structure of amounting plate provided in an embodiment of the present application;

FIG. 8 is an enlarged schematic diagram of a part B of FIG. 5 , wherereference numerals of a first restraint face and a second restraint faceare shown.

FIG. 9 is a schematic diagram of a three-dimensional structure of afirst end plate provided in an embodiment of the present application;

FIG. 10 is a schematic diagram of a three-dimensional structure of a boxbody of a battery provided in an embodiment of the present application;

FIG. 11 is an enlarged schematic diagram of a part C of FIG. 5 ;

FIG. 12 is a schematic exploded view of a battery provided in anotherembodiment of the present application;

FIG. 13 is a schematic diagram of a three-dimensional structure of afirst end plate provided in another embodiment of the presentapplication;

FIG. 14 is a schematic front view of a battery provided in anotherembodiment of the present application;

FIG. 15 is a schematic sectional view taken along a line D-D in FIG. 14;

FIG. 16 is a locally enlarged schematic diagram of FIG. 15 ;

FIG. 17 is a schematic sectional view of a first end plate along asecond direction provided in another embodiment of the presentapplication; and

FIG. 18 is a flowchart of a method for producing a battery provided inan embodiment of the present application.

DESCRIPTION OF EMBODIMENTS

To make the objectives, technical solutions and advantages of theembodiments of the present application clearer, the technical solutionsin the embodiments of the present application will be described clearlyand completely below with reference to the accompanying drawings in theembodiments of the present application. Apparently, the describedembodiments are merely some but not all of the embodiments of thepresent application. The components of the embodiments of the presentapplication generally described and shown in the drawings herein may bearranged and designed in various configurations.

Therefore, the following detailed description of the embodiments of thepresent application provided in the accompanying drawings is notintended to limit the scope of the claimed application, but merelyrepresents selected embodiments of the present application. All theother embodiments obtained by those of ordinary skill in the art basedon the embodiments of the present application without any inventiveeffort shall fall within the scope of protection of the presentapplication.

It should be noted that, the embodiments in the present application andfeatures in the embodiments may be mutually combined in case of noconflict. It should be noted that similar reference numerals and lettersindicate similar items in the following drawings. Therefore, once acertain item is defined in one drawing, it is unnecessary to furtherdefine and explain it in the subsequent drawings.

In the description of the embodiments of the present application, itshould be noted that, the terms such as “up”, “down”, “inside”, and“outside” indicate that orientations or positional relationships areorientations or positional relationships shown based on the accompanyingdrawings, or orientations or positional relationships of products of thepresent application when they are used, or orientations or positionalrelationships commonly appreciated by those skilled in the art, ororientations, and they are merely for convenience of describing thepresent application and for simplifying the description, rather than forindicating or implying that an indicated apparatus or element must havea specific orientation, and must be constructed and operated in aspecific orientation, which thus shall not be understood as limitationto the present application. In addition, the terms such as “first”,“second”, and “third” are merely intended for distinguishing thedescription, and shall not be understood as an indication or implicationof relative importance.

In the description of the present application, it should be furthernoted that, unless explicitly specified and defined otherwise, if theterms “disposing”, “mounting”, “connecting”, and “connection” occur,they should be understood in a broad sense, for example, they may be afixed connection, a detachable connection, or an integrated connection;they may be a mechanical connection, or an electrical connection; andthey may be a direct connection, or an indirect connection via anintermediary, or communication between interiors of two elements. Thoseof ordinary skill in the art may appreciate the specific meanings of theforegoing terms in the present application according to specificconditions.

Application of a battery generally includes three levels: a batterycell, a battery module, and a battery pack. The battery cell includes apositive electrode sheet, a negative electrode sheet, an electrolyticsolution and a separator. The separator is disposed between the positiveelectrode sheet and the negative electrode sheet to prevent internalshort circuits. A common battery cell may be generally divided intothree types according to the way of packaging: a cylindrical batterycell, a prismatic battery cell and a pouch battery cell.

The battery module refers to a single physical module including aplurality of battery cells to provide a higher voltage and/or capacity.In the battery module, the plurality of battery cells may be connectedin series and/or in parallel via busbars for various applications, forexample, high-power applications such as some electric vehicles.

The battery pack is constructed by assembling components such as abattery management system on the basis of one or more battery modules,and then putting them in a sealed box body, and the box body is thenconnected to a power consumption apparatus such as an electric vehicle.The battery mentioned in the embodiments of the present application maybe a battery pack.

During the production of the box body of the battery, it is more andmore popular to adopt a die-casting process for molding. The die-castingprocess for molding has the advantages of high production efficiency andsimple processes. However, a side wall of the box body for which thedie-casting process for molding is adopted has a draft angle, resultingin that it is difficult to construct a restraint structure between thebattery module and an inner wall of the box body by themselves, and itis difficult to realize stable mounting of the battery module in the boxbody without the help of a fastener. The use of a fastener to connectthe two results in that it is difficult to provide suitable expansionspace for the battery module in the battery. Since the battery moduleand the box body are rigidly connected using a bolt, during theexpansion the battery module, although part of an expansion force couldbe released to a certain extent through partial deformation of an endplate of the battery module, a rigid connection is formed between theend plate and the box body due to the use of locking with a bolt betweenthe two. Therefore, the box body is certainly affected during thedeformation of the end plate, which may cause the deformation of the boxbody. If it is desirable to avoid the deformation of the box body due tothe deformation of the end plate, an amount of partial deformation ofthe end plate is small, which is not benefit for providing sufficientexpansion space for the battery module. The battery cell is stillsqueezed by the inner wall of the box body during the expansion, and aphenomenon of lithium plating may occur, resulting in a dive of batterycapacity.

In view of this, a battery 10 is provided in some embodiments of thepresent application. In the battery 10, expansion space could beprovided for a battery module 200, and an expansion force could bereleased, which is benefit for reducing possibility of occurrence oflithium plating due to squeeze of battery cells 211, and could reducepossibility of deformation of a box body 100 at the same time. In otherwords, the possibility of deformation of the box body 100 may be reducedwhile the expansion space is provided for the battery module 200.

An embodiment of the present application provides a power consumptionapparatus that uses the battery 10 as a power source. The powerconsumption apparatus may be, but is not limited to, a vehicle 1, a shipor an aerial vehicle.

It can be understood that the battery 10 described in the embodiments ofthe present application is applicable to various apparatuses usingbatteries, such as mobile phones, notebook computers, electromobiles,electric automobiles, ships, spacecrafts, electric toys and electrictools. For example, the spacecrafts include rockets, space shuttles,spaceships, and the like. The electric toys include fixed or mobileelectric toys, such as game consoles, electric vehicle toys, electricship toys and electric airplane toys. The electric tools includeelectric metal cutting tools, electric grinding tools, electricassembling tools and electric railway tools, such as electric drills,electric grinders, electric spanners, electric screwdrivers, electrichammers, concrete vibrators, and electric planers.

The battery described in the embodiments of the present application isnot only applicable to the power consumption apparatus described above,but also applicable to all apparatuses using the battery 10.

As shown in FIG. 1 , FIG. 1 is a schematic structural diagram of avehicle 1 according to an embodiment of the present application. Thevehicle 1 may be a fuel-powered vehicle, a gas-powered vehicle or a newenergy vehicle, and the new energy vehicle may be a battery electricvehicle, a hybrid vehicle, an extended-range vehicle, or the like. Abattery 10, a motor 20 and a controller 30 may be disposed inside thevehicle 1, and the controller 30 is configured to control the battery 10to supply power to the motor 20. For example, the battery 10 is disposedat the bottom or head of the vehicle 1. The battery 10 may be used forpower supply to the vehicle 1. For example, the battery 10 may serve asan operation power source of the vehicle 1 for a circuit system of thevehicle 1, for example, for a working power demand of the vehicle 1during startup, navigation and running.

In another embodiment of the present application, the battery 10 may beused not only as an operation power source of the vehicle 1, but also asa driving power source of the vehicle 1, replacing or partiallyreplacing fuel or natural gas to provide driving power for the vehicle1.

During the production of a box body of the battery, it is more and morepopular to adopt a die-casting process for molding. The die-castingprocess for molding has the advantages of high production efficiency andsimple processes. However, a side wall of the box body for which thedie-casting process for molding is adopted has a draft angle, resultingin that it is difficult to construct a restraint structure between abattery module and an inner wall of the box body by themselves, and itis difficult to realize stable mounting of the battery module in the boxbody without the help of a fastener. The use of a fastener to connectthe two results in that it is difficult to provide suitable expansionspace for the battery module in the battery.

In some embodiments of the present application, the vehicle may bepowered by a battery 10 as shown in FIG. 2 and FIG. 3 . The battery 10includes a battery module 200, a mounting plate 300 and a box body 100,and the battery module 200 and the mounting plate 300 are disposed inthe box body 100. The battery module 200 includes a battery cellarrangement structure 210 and a first end plate 220, the battery cellarrangement structure 210 may include a plurality of battery cells 211stacked along a first direction A1, the first end plate 220 is disposedbetween the box body 100 and the battery cell arrangement structure 210,and the first end plate 220 is fixedly connected to the battery cellarrangement structure 210. The mounting plate 300 is disposed betweenthe first end plate 220 and the box body 100, and the mounting plate 300is fixedly connected to the box body 100.

As shown in FIG. 4 to FIG. 6 , the first end plate 220 includes a firstelastic support part 224, the first elastic support part 224 isconfigured to be capable of abutting the mounting plate 300, beingsqueezed by the battery cell arrangement structure 210 and deformingwhen the battery cell arrangement structure 210 expands to provideexpansion space for the battery cell arrangement structure 210.

In the foregoing technical solution, since the battery cell arrangementstructure 210 includes the plurality of battery cells 211 in the firstdirection A1, the battery module 200 expands mainly along the firstdirection A1 when expanding. The first elastic support part 224 providesthe expansion space through its own deformation, and the deformation isreliable, which could provide the expansion space for the battery cellarrangement structure 210 in time (that is, the expansion space isprovided for the battery module 200), mainly the expansion space in thefirst direction A1, to release an expansion force of the battery cellarrangement structure 210, could reduce the possibility of deformationof the box body 100 caused by the expansion force, and improvesreliability of assembly and the service life of the box body 100.Meanwhile, by releasing the expansion force, the possibility ofoccurrence of lithium plating in the battery cells 211 caused by anexcessive squeezing force between the mounting plate 300 and the firstend plate 220 could be reduced. Therefore, the possibility ofdeformation of the box body 100 may be reduced while the expansion spaceis provided for the battery module 200, which is beneficial to normaloperation of the battery 10.

In addition, due to the provision of the mounting plate 300, it isbenefit for adding a molding manner of the box body 100. For example, byproviding the mounting plate 300, the box body 100 may be molded bymeans of a die-casting process. By reasonably designing a structure ofthe mounting plate 300 and arranging its position on the box body 100,it is benefit for offsetting a draft angle of the box body 100 tofacilitate construction of a restraint structure between the batterymodule 200 and the box body 100, so as to realize restraint of thebattery module 200 in the box body 100.

The fixed connection between the first end plate 220 and the batterycell arrangement structure 210 can be realized in any suitable manner,for example, bonding, or connecting with a cable tie, or connecting thefirst end plate 220 and the battery cell arrangement structure 210 usingan end side plate, which is not limited in the embodiments of thepresent application.

The fixed connection between the mounting plate 300 and the box body 100may mean that the two are connected through a fastener, or the two arewelded, or the like, which is also not limited in the embodiments of thepresent application.

In an embodiment of the present application, as shown in FIG. 2 and FIG.3 , the box body 100 may include a lower box body 101 and an upper coverbody 102, the upper cover body 102 hermetically covers the lower boxbody 101, and the battery module 200 may be mounted to the lower boxbody 101.

As shown in FIG. 3 and FIG. 6 , in an embodiment of the presentapplication, the box body 100 includes a first wall 110 and a secondwall 120, the second wall 120 is connected to the first wall 110 andextends upward, the battery module 200 is located above the first wall110, that is, the first wall 110 is a bottom wall of the box body 100,the second wall 120 is a side wall connected to the bottom wall, and themounting plate 300 is disposed between the first end plate 220 and thesecond wall 120. The first wall 110 may be a bottom wall of the lowerbox body 101, and the second wall 120 may be a side wall of the lowerbox body 101. For this reason, the expansion space is provided betweenthe first end plate 220 and the mounting plate 300 for the battery cellarrangement structure 210 through the deformation of the first elasticsupport part 224, which could reduce a squeezing force of the batterymodule 200 to the second wall 120 of the box body 100.

As shown in FIG. 6 , in an embodiment of the present application, themounting plate 300 may be connected to the second wall 120 through afirst fastener 500 to fix the mounting plate 300 to the box body 100.

To ensure reliability of the connection between the mounting plate 300and the second wall 120, as shown in FIG. 6 , in an embodiment of thepresent application, a restraint groove 410 with an opening facingupward is disposed in the box body 100, and a lower end of the mountingplate 300 is plugged into the restraint groove 410. For this reason, thelower end of the mounting plate 300 is restrained in the box body 100,which improves reliability of the connection between the mounting plateand the box body 100.

The restraint groove 410 may be formed in any suitable structure. Forexample, a restraint member 400 is fixed in the box body 100, and theabove restraint groove 410 is provided on the restraint member itself,or the restraint groove 410 is restricted by the restraint member 400and an inner wall of the box body 100, or the restraint groove 410 isprovided on an inner wall of the box body 100. For example, therestraint groove 410 is provided on the first wall 110.

Optionally, as shown in FIG. 6 , in an embodiment of the presentapplication, a restraint member 400 is disposed in the box body 100, therestraint member 400 has an upright part 420, and the restraint groove410 is restricted between the upright part 420 and the second wall 120.

Optionally, as shown in FIG. 6 , the restraint member 400 may be anL-shaped plate, the L-shaped plate includes an upright part 420 and ahorizontal part 430 connected to each other, a bottom face of thehorizontal part 430 is connected to the first wall 110, and one end ofthe horizontal part 430 far away from the upright part 420 is connectedto the second wall 120. The structure of the L-shaped plate is simple,and the L-shaped plate is connected to the first wall 110 through thehorizontal part 430, which increases the connection area between therestraint member 400 and the inner wall of the box body 100, therebyincreasing reliability of the connection between the two, and furtherbeing benefit for ensuring reliability of restraint of the restraintmember 400 on the lower end of the mounting plate 300.

The bottom face of the horizontal part 430 may be welded to the firstwall 110, and one end of the horizontal part 430 far away from theupright part 420 may be welded to the second wall 120.

As shown in FIG. 6 and FIG. 7 , in an embodiment of the presentapplication, the lower end of the mounting plate 300 is bent toward thesecond wall 120 to construct a restraint step 360, the upright part 420of the restraint member 400 abuts on a step face of the restraint step360, and an upright section of the restraint step 360 is inserted intothe restraint groove 410. This arrangement is benefit for avoiding theupright part 420 of the restraint member 400 to protrude from a face ofthe mounting plate 300 close to the first end plate 220 toward the firstend plate 220. Therefore, during the expansion of the battery module200, possibility of restraining movement of the first end plate 220toward the mounting plate 300 due to the protrusion of the upright part420 could be reduced while possibility of applying a squeezing force topart of the first end plate 220 due to the protrusion of the uprightpart 420 is reduced, thereby being benefit for improving consistency offorces that the battery cells 211 are subjected to.

The specific structure of the mounting plate 300 is not limited in theembodiments of the present application. As shown in FIG. 6 , optionally,in an embodiment of the present application, the mounting plate 300includes a mounting plate body 350 and a first extending part 310, thefirst extending part 310 extends from the mounting plate body 350 towardthe second wall 120, and the first extending part 310 is fixedlyconnected to the second wall 120. By providing the first extending part310, it facilitates the connection between the mounting plate 300 andthe second wall 120. In addition, due to the provision of the firstextending part 310, the mounting plate body 350 could be connected tothe second wall 120 through the first extending part 310 when arrangedin an upright direction. In this way, a draft angle of the second wall120 could be offset, and the connection between the mounting plate 300and the box body 100 is conveniently realized.

As shown in FIG. 6 , the first extending part 310 may be fixedlyconnected to an upper surface of the second wall 120. The firstextending part 310 is connected to the upper surface of the second wall120 to facilitate operation and be benefit for simplifying theconnection structure therebetween. For example, as shown in FIGS. 6 and7 , the upper surface of the second wall 120 is provided with a mountingbolt hole 121, the first extending part 310 is provided with a mountingthrough hole 311, and a lower end of the first fastener 500 passesthrough the mounting through hole 311 to be fixed in the mounting bolthole 121.

In other embodiments of the present application, a groove into which thefirst extending part 310 is inserted may be provided in the middle ofthe second wall 120 in the height direction, and the first extendingpart 310 is fixed into the groove with the help of a fastener.

As shown in FIG. 6 and FIG. 7 , in an embodiment of the presentapplication, the first extending part 310 may be multiple in quantity,the multiple first extending parts 310 are arranged at intervals along alength direction of the mounting plate 310 (a direction perpendicular tothe first direction A1), a plurality of recessed parts 122 are providedat corresponding positions on the upper surface of the second wall 120,and the first extending parts 310 are plugged into the recessed parts122. Mounting bolt holes 121 are formed on bottom walls of the recessedparts 122. The multiple first extending parts 310 are benefit forimproving the reliability of the connection between the mounting plate300 and the second wall 120. Moreover, the first extending parts 310 areplugged into the recessed parts 122, which is also benefit for furtherimproving the reliability of the connection between the mounting plate300 and the second wall 120.

As shown in FIG. 6 and FIG. 7 , in an embodiment of the presentapplication, the mounting plate 300 further includes a second extendingpart 320, the second extending part 320 extends from the mounting platebody 350 toward the second wall 120 and abuts the second wall 120, andthe second extending part 320 and the first extending part 310 arespaced apart in an up-down direction. By providing the second extendingpart 320, connection points between the mounting plate 300 and thesecond wall 120 in the up-down direction are increased, and thereliability of the connection between the mounting plate 300 and thesecond wall 120 is improved.

Optionally, one end of the second extending part 320 for abutting thesecond wall 120 may be provided with an inclined face to facilitateface-to-face contact with the second wall 120.

The first extending part 310 may be located either above the secondextending part 320 or below the second extending part 320, which is notlimited in the embodiments of the present application. Optionally, inthe embodiment shown in FIG. 6 , the first extending part 310 is locatedabove the second extending part 320, and the second extending part 320is substantially connected to the middle position of the second wall 120in the height direction.

In an embedment of the present application, rigidity of the mountingplate 300 may be greater than rigidity of the first end plate 220, sothat when the battery cell arrangement structure 210 expands, the firstend plate 220 easily deforms to provide expansion space for the batterymodule 200. Meanwhile, the rigidity of the mounting plate 300 meets therequirements, which plays a role in reliably mounting the battery module200 in the box body 100.

The specific materials of the mounting plate 300 and the first end plate200 are not limited in the embodiments of the present application.Optionally, in an embodiment of the present application, the mountingplate 300 may be made of a metal material, for example, an aluminumalloy material. The first end plate 220 is made of a non-metal material,for example, a plastic material.

In an embodiment of the present application, a height of the mountingplate 300 is not smaller than a height of the battery cell arrangementstructure 210, and the height of the mounting plate 300 is greater thana height of the second wall 120.

In this embodiment, even if the height of the second wall is relativelysmall (the height is smaller than the height of the battery cellarrangement structure 210), when the battery cell arrangement structure210 expands, the mounting pate 300 can abut the first end plate 220 inthe up-down direction, which does not cause the position of the firstend plate 220 corresponding to the height of the upper surface of thesecond wall 120 to be subjected to a shear force, and thus the case ofdamage to the battery cells 211 caused by reduction of the height of thesecond wall 120 does not occur.

To deform the first elastic support part 224 easily when squeezed, asshown in FIG. 8 , in an embodiment of the present application, at leasta portion of the first elastic support part 224 obliquely extends upwardtoward the mounting plate 300. For this reason, when the first end plate220 is squeezed, since the first elastic support part 224 has aninclined angle, the first elastic support part 224 deforms more easilywhen squeezed by the mounting plate 300, which could provide theexpansion space for the battery cell arrangement structure 210 in time.

It should be noted that the angle at which the first elastic supportpart 224 inclines upward may be any angle, as long as the deformationrequirement can be met, and the angle at which the first elastic supportpart 224 inclines upward is not limited in the embodiments of thepresent application.

As shown in FIG. 8 and FIG. 9 , in an embodiment of the presentapplication, the first end plate 220 further includes an end plate body223, the end plate body 223 has a first surface 2231 facing the batterycell arrangement structure 210 and a second surface 2232 facing awayfrom the battery cell arrangement structure 210, and the first elasticsupport part 224 is disposed on the second surface 2232. The secondsurface 2232 is a large face (a face with a large area) of the end platebody 223, which facilitates the provision of the first elastic supportpart 224. In addition, since the second surface 2232 is a large face, itfacilitates arrangement of more first elastic support parts 224, whichis benefit for dispersing the expansion force of the battery cellarrangement structure 210, and reduces a phenomenon of occurrence oflithium plating due to squeeze of the battery cells 211 caused byconcentration of the squeezing force.

It can be understood that, in other embodiments of the presentapplication, the first elastic support parts 244 may be disposed on twoside walls of the end plate body 233 in a thickness direction (the firstdirection A1), that is, on small faces (faces with a small area) of theend plate body 223, and extend toward the mounting plate 300.

To disperse the expansion force of the battery cell arrangementstructure 210 as much as possible, in an embodiment of the presentapplication, an orthographic projection of the first elastic supportpart 224 on a horizontal plane is in a long strip shape, a face on whichone long side of the long strip shape is located is connected to thesecond surface 2232, and a face on which the other long side of the longstrip shape is located abuts the mounting plate 300. In other words, thefirst elastic support part 224 is arranged on the second surface 2232along a length direction of the first end plate 220 (a directionperpendicular to the first direction A1), which is benefit fordispersing the expansion force of the battery cell arrangement structure210 in the length direction of the first end plate 220.

To deform the first elastic support part 224 easily, as shown in FIG. 8, optionally, the first elastic support part 224 may be shaped in a thinsheet. That is, in this embodiment, the first elastic support part 224is constructed as a thin sheet-shaped structure obliquely extendingupward.

It should be noted that the specific structure of the first elasticsupport part 224 is not limited in the embodiments of the presentapplication. For example, the first elastic support part 224 may beconstructed as a horizontal protrusion extending along the firstdirection A1, and the first elastic support part 224 is provided with astrength weakening structure such as a groove to weaken the strength ofthe first elastic support part 224, so that the first elastic supportpart 224 deforms easily when squeezed by the second wall 120. Inaddition, the first elastic support part 224 may be a spring, one end ofthe spring is connected (for example, welded) to the second surface2232, and the other end extends toward the mounting plate 300.

As shown in FIG. 8 and FIG. 9 , in an embodiment of the presentapplication, the first elastic support part 224 is multiple in quantity,and the multiple first elastic support parts 224 are arranged atintervals on the second surface 2232 along an up-down direction, whichis benefit for evenly dispersing the expansion force, improvesconsistency of forces that positions on a face where the battery cellarrangement structure 210 is in contact with the first end plate 220 aresubjected to, improves consistency of forces that the battery cells 211are subjected to, and reduces the problem caused by inconsistent forcesthat the battery cells 211 are subjected to.

Further, as shown in FIG. 9 , the multiple first elastic support parts224 may be arranged in a rectangular array on the second surface 2232 tobe benefit for evenly dispersing the expansion force of the entirebattery arrangement structure 210 transferred to the first end plate 220and to further improve consistency of forces that positions on thebattery cell arrangement structure 210 are subjected to, which improvesconsistency of forces that the battery cells 211 are subjected to.

In a battery of the prior art, to mount a battery module in a box bodyand restrain the battery module to freely move upward in the box body,an end plate of the battery module is usually mounted to a side wall ofthe box body through a fastener (for example, a locking bolt). Tofacilitate the mounting of the fastener, a thickness size of the sidewall of the box body is relatively great. Therefore, it is not benefitfor increasing the space of the box body for accommodating the batterymodule, and utilization of space in the box body is reduced.

As shown in FIG. 8 , in an embodiment of the present application, themounting plate 300 is provided with a first restraint face 330, and thefirst restraint face 330 is configured to abut the first end plate 220to limit the first end plate 220 to move upward. The first restraintface 330 limits the first end plate 220 to freely move upward, whichensures mounting positions of the first end plate 220 and the batterymodule 200 in the up-down direction (that is, a height direction of thefirst end plate 220), and avoids affecting normal operation of thebattery module 200 due to the upward movement of the battery module 200.For this reason, it is possible to omit locking with a bolt between thefirst end plate 220 and the mounting plate 300, which is benefit forreducing the use of parts, and improves utilization of space inside thebox body 100. Moreover, since locking with a bolt is cancelled, therigid connection between the first end plate 220 and the mounting plate300 is released, so that the possibility of deformation of the box body100 may be reduced while the battery 10 provides the expansion space forthe battery module 200.

The first restraint face 330 may be constructed in any suitablestructure. As shown in FIG. 8 , in an embodiment of the presentapplication, a surface of the second wall 120 facing the first end plate220 is partially recessed to form a groove, and an upper side wall ofthe groove is a the first restraint face 330. The manner of constructingthe first restraint face 330 through the upper side wall of the grooveis beneficial to weight reduction of the box body 100 while the space ofthe box body 100 for accommodating the battery module 200 is notoccupied.

As shown in FIG. 8 , in an embodiment of the present application, thefirst end plate 220 is provided with a first restraint protrusion 221,and an upper surface of the first restraint protrusion 221 is configuredto abut the first restraint face 330 to limit the first end plate 220 tomove upward. The manner in which the first restraint protrusion 221abuts the first restraint face 330 for restraint realizes that the firstend plate 220 and the mounting plate 300 are reliably restrained, andcompared with the manner of locking with a bolt, it further has theadvantages of simple structure, convenient mounting of the batterymodule 200 in the box body 100, and the like.

To ensure the restraint effect of the first restraint protrusion 221, asshown in FIG. 8 , in an embodiment of the present application, the firstrestraint protrusion 221 horizontally extends toward the mounting plate300. For this reason, when the battery module 200 expands, the directionin which the first restraint protrusion 221 may move (upward) isperpendicular to the extending direction, so that it is not easy toslide between the first restraint protrusion 221 and the first restraintface 330, which could improve reliability of restraint of the firstrestraint protrusion 221 and the first restraint face 330.

Further, as shown in FIG. 8 , the first restraint face 330 may be a faceparallel to a horizontal plane. In this way, when the first restraintprotrusion 221 extending toward the second wall 120 along the horizontaldirection abuts the first restraint face 330, the two faces are fullyattached, which further improves the reliability of restraint of thefirst restraint protrusion 221 and the first restraint face 330.

When the battery 10 is assembled, first, a squeezing force may beapplied to the battery module 200 to compress the length of the batterymodule 200 in the first direction A1; then, the battery module 200 in acompressed state is placed in the box body 100 and on the first wall110; and later, the squeezing force is removed to restore the length ofthe battery module 200, so as to move the first restraint protrusion 221of the first end plate 220 to a bottom of the first restraint face 330.

To smoothly move the first restraint protrusion 221 to the bottom of thefirst restraint face 330 after removing the squeezing force, as shown inFIG. 8 , in an embodiment of the present application, after the batterymodule 200 is mounted in the box body 100 in place, a gap is providedbetween an upper surface of the first restraint protrusion 221 and thefirst restraint face 330 in the up-down direction when the battery cellarrangement structure 210 does not expand. For this reason, afterremoving the squeezing force squeezing the first end plate 220, sincethere is a gap in the up-down direction, the first restraint face 330does not interfere with the horizontal movement of the first restraintprotrusion 221, which is benefit for smoothly moving the first restraintprotrusion 221 to a bottom of the first restraint face 330.

As shown in FIG. 8 , optionally, after the battery module 200 is mountedin the box body 100 in place, a gap is provided between the firstrestraint protrusion 221 and the mounting plate 300 in the horizontaldirection when the battery cell arrangement structure 210 does notexpand, so that the first end plate 220 could move toward the mountingplate, thereby providing the expansion space for the battery cellarrangement structure 210.

In this way, during the expansion of the battery cell arrangementstructure 210, the horizontal movement of the first restraint protrusion221 is divided into two stages. At the first stage, the first restraintprotrusion 221 horizontally moves toward the mounting plate 300 until itabuts the mounting plate 300. If the battery cell arrangement structure210 still expands after the first restraint protrusion 221 abuts themounting plate 300, the end plate body 223 of the first end plate 220may partially deform to provide the expansion space continuously.

In an embodiment of the present application, the battery module 200 isbonded to the first wall 110 through a bonding adhesive. In the existingbattery 10, the case of pressure adhesive occurs in the battery module200, that is, after the battery module 200 is mounted in the box body100, since the battery module 200 excessively squeezes the bondingadhesive on it and the first wall 110, a thickness of an adhesive layerbetween a lower end of the battery module 200 and the first wall 110 isrelatively small, which is not beneficial to the connection between thelower end of the battery module 200 and the first wall 110.

In view of this, as shown in FIG. 8 , in an embodiment of the presentapplication, the second wall 120 is further provided with a secondrestraint face 340, and the second restraint face 340 is configured toabut the first end plate 220 to limit the first end plate 220 to movedownward. For this reason, after the battery module 200 is mounted inthe box body 100, possibility of excessive pressure adhesive for thebattery module 200 could be reduced, which is benefit for ensuring thatthe thickness of the adhesive layer meets the requirements, therebyensuring a bonding effect between the lower end of the battery module200 and the first wall 100.

The second restraint face 340 may be constructed in any suitablestructure. As shown in FIG. 8 and FIG. 9 , in an embodiment of thepresent application, the upper surface of the second wall 120 is thesecond restraint face 340, and the existing upper surface of the secondwall 120 is used as a restraint face, which is benefit for simplifyingthe structure of the second wall 120.

In other embodiments of the present application, a surface of the secondwall 120 facing the first end plate 220 is partially recessed to form agroove, and a lower side wall of the groove is constructed as the secondrestraint face 340.

It should be noted that the specific position relationship between thefirst restraint face 330 and the second restrain face 340 in the up-downdirection is not limited in the embodiments of the present application.Optionally, in the embodiment shown in FIG. 8 , the second restraintface 340 is an upper surface of the mounting plate body 350, and thesecond restraint face 340 is located above the first restraint face 330.

As shown in FIG. 8 and FIG. 9 , in an embodiment of the presentapplication, the first end plate 220 is further provided with a secondrestraint protrusion 222, and a lower surface of the second restraintprotrusion 222 is configured to abut the second restraint face 340 tolimit the first end plate 220 to move downward. The manner in which thesecond restraint protrusion 222 abuts the second restraint face 340 forrestraint has the advantages of simple structure, convenient mounting ofthe battery module 200 in the box body 100, and the like, whilerealizing that the first end plate 220 and the box body 100 are reliablyrestrained.

To ensure the restraint effect of the second restraint protrusion 222,as shown in FIG. 7 , in an embodiment of the present application, thesecond restraint protrusion 222 extends toward the mounting plate 300along the horizontal direction.

As shown in FIG. 8 and FIG. 9 , the first restraint protrusion 221 isdisposed on the second surface 2232 of the end plate body 223. Thesecond surface 2232 is a large face (a face with a large area) of theend plate body 223, which facilitates the provision of the firstrestraint protrusion 221. Moreover, since the second surface 2232 is alarge face, it facilitates arrangement of a longer first restraintprotrusion 221 long the length direction of the first end plate 220 (adirection perpendicular to the first direction A1) to improve thereliability of restraint of the battery module 200 in the box body 100in the up-down direction as much as possible.

It can be understood that, in other embodiments of the presentapplication, the first restraint protrusions 221 may be disposed on twosides of the end plate body 223 in a thickness direction (the firstdirection A1), that is, on small faces (faces with a small area) of theend plate body 223, and extend toward the mounting plate 300.

In an embodiment of the present application, an orthographic projectionof the first restraint protrusion 221 on the horizontal plane is in along strip shape, and a face on which one long side of the long stripshape is connected to the second surface 2232. The first restraintprotrusion 221 is in a long strip shape, which is benefit for increasingthe contact area between the first restraint protrusion 221 and thefirst restraint face 330, thereby being benefit for improving therestraint effect of the first restraint protrusion 221.

Similarly, as shown in FIG. 8 and FIG. 9 , the second restraintprotrusion 222 may be disposed on the second surface 2232 of the firstend plate 220. The second surface 2232 is a large face of the first endplate 220, which facilitates the provision of the second restraintprotrusion 222. Moreover, since the second surface 2232 is a large face,it facilitates arrangement of a longer second restraint protrusion 222along the length direction of the first end plate 220 to improve thereliability of restraint of the battery module 200 in the box body 100in the height direction.

It can be understood that, in other embodiments of the presentapplication, the second restraint protrusions 222 may be disposed on twosides of the end plate body 233 in a thickness direction, that is, onsmall faces (faces with a small area) of the end plate body 223, andextend toward the mounting plate 300.

In addition, an orthographic projection of the second restraintprotrusion 222 on the horizontal plane may be in a long strip shape, anda face on which one long side of the long strip shape is connected tothe second surface 2232. The second restraint protrusion 222 is in along strip shape, which is benefit for increasing the contact areabetween the second restraint protrusion 222 and the second restraintface 340, thereby being benefit for improving the restraint effect ofthe second restraint protrusion 222.

In the embodiments of the present application, the lower end of thebattery cell arrangement structure 210 may be attached to the first wall110, and a gap is provided between the lower end of the first end plate220 and the first wall 110 to ensure the contact between the batterycell arrangement structure 210 and the first wall 110.

It should be noted that the “attachment” mentioned above may mean thatthe lower end of the battery cell arrangement structure 210 is incontact with but not connected to the first wall 110, or mean that thelower end of the battery cell arrangement structure 210 is in contactwith and connected to the first wall 110. For example, the two arebonded by an adhesive.

As shown in FIG. 3 and FIG. 10 , in an embodiment of the presentapplication, the box body 100 may include a third wall 130, the thirdwall 130 is connected to the first wall 100 and extends upward, thethird wall 130 is disposed opposite to the second wall 120 along thefirst direction A1, and the first elastic support part 224 abuts themounting plate 300 when the battery cell arrangement structure 210 doesnot expand to realize locating of the battery module 200 in the firstdirection A1. For this reason, after the battery module 200 is mountedin the box body 100, the first elastic support part 224 of the first endplate 220 abuts the mounting plate 300, and a second end plate 230 isfixedly connected to the third wall 120, which could provide mountinglocating in the first direction A1 for the battery module 200, andensures the reliability of the mounting of the battery module 200 in thefirst direction A1.

Here, when the battery cell arrangement structure 210 does not expand,the first elastic support part 224 abuts the mounting plate 300, whichmay mean that the first elastic support part 224 is exactly in contactwith the mounting plate 300 and the first elastic support part 224 is inan unreformed state, or mean that the first elastic support part 224abuts on the mounting plate 300 and is in a deformed state, which is notlimited in the embodiments of the present application.

Optionally, in an embodiment of the present application, the batterymodule 200 is in an interference fit with the box body 100, and thefirst elastic support part 224 is configured to absorb a magnitude ofinterference in the first direction A1 through generation of elasticdeformation. That is, in this embodiment, when the battery cellarrangement structure 210 does not expand, the first elastic supportpart 224 abuts on the mounting plate 300 and is in a deformed stated. Inaddition to the advantage of providing the mounting locating in thefirst direction A1 for the battery module 200 mentioned above, thissetting has at least the following two advantages: first, after thebattery module 200 is assembled in place, the first elastic support part224 provides an assembly margin in the first direction A1 for thebattery module 200, so that a dimension error of the battery module 200in the first direction A1 can be offset by the deformation of the firstelastic support part 224. For example, when a dimension of the batterymodule 200 in the first direction A1 is greater than a mountingdimension of the box body 100 in the corresponding direction, it can berealized that the battery module 200 is smoothly mounted in the box body100 through the deformation of the first elastic support part 224.Therefore, requirements on processing and assembly accuracy of thebattery module 200 in the first direction A1 are reduced. Second, afterthe battery module 200 is assembled in place, since the first elasticsupport part 244 is in a deformed state, a reaction force of themounting plate 300 could be transferred to the battery cell arrangementstructure 210. The battery cells 211 are subjected to a certainpressure, which is benefit for ensuring good contact between interfacesof positive electrode sheets and negative electrode sheets inside thebattery cells 211.

As shown in FIG. 3 and FIG. 11 , in an embodiment of the presentapplication, the battery further includes a second end plate 230. Thesecond end plate 230 is disposed opposite to the first end plate 220along the first direction A1, the battery cell arrangement structure 210is located between the first end plate 220 and the second end plate 230,and the second end plate 230 is fixedly connected to both the batterycell arrangement structure 210 and the box body 100. That is, in thisembodiment, deformation space is provided between one end of the batterymodule 200 in the first direction A1 and the box body 100 through thefirst elastic support part 224, and the other end of the battery module200 in the first direction A1 is rigidly connected to the box body 100.When the battery cell arrangement structure 210 expands, it expandstoward one end at which the first end plate 220 is located, the batterymodule 200 could expand in a preset direction while the release of theexpansion force of the battery cell arrangement structure 210 isrealized, and squeeze and deformation of a side wall of the box body atthe other end of the battery module 200 could be avoided.

In the embodiments shown in FIG. 3 , FIG. 10 and FIG. 11 , two middlebeams are provided inside the box body 100 (a lower box body 102). Thetwo middle beams are respectively constructed as third walls 130 of thebox body 100 for mounting two battery modules 200, the two middle beamsare spaced apart in the first direction A1, and the space between thetwo middle beams may be configured to mount an electrical element, forexample, an electrical case. As mentioned above, since the batterymodule 200 expands mainly toward the second wall 120 of the box body100, it is not easy to squeeze and deform the two middle beams when thebattery module 200 expands, which could play a role in protecting theelectrical element mounted between the two middle beams.

It should be noted that, in other embodiments of the presentapplication, two ends of the battery cell arrangement structure 210 inthe first direction A1 each may be provided with the above first endplates 220, and the second wall 120 and the third wall 130 of the boxbody 100 may be connected to one of the above mounting plates 300,respectively. In this way, when expanding, the battery module 200 couldmove toward both the second wall 120 and the third wall 130 in the boxbody 100.

To ensure that the battery module 200 expands in a preset direction,optionally, in an embodiment of the present application, rigidity of thesecond end plate 230 may be greater than rigidity of the first end plate220. For this reason, when the battery cell arrangement structure 210expands, the second end plate 230 does not easily deform, and the firstend plate 220 easily deforms, so that the battery module 200 expandstoward the first end plate 220 more easily.

The specific materials of the first end plate 220 and the second endplate 230 are not limited in the embodiments of the present application.Optionally, in an embodiment of the present application, the second endplate 230 is made of a metal material, and the first end plate 220 ismade of a non-metal material. For example, the second end plate 230 maybe made of an aluminum alloy material, and the first end plate 220 maybe made of a plastic material.

As shown in FIG. 11 , in an embodiment of the present application, thesecond end plate 230 is provided with a third extending part 231, andthe third extending part 231 is configured to be connected to the thirdwall 130. By providing the third extending part 231, it is benefit foroffsetting a draft angle of the second wall 120 of the box body 100while facilitating the connection between the third extending part 231and the third wall 130.

Optionally, as shown in FIG. 11 , the first extending part 231 isconnected to the third wall 130 through a second fastener 600, where anupper surface of the third wall 130 is provided with a second mountingbolt hole 131, the second fastener 600 is a fastening bolt, and a lowerend of the second fastener 600 passes through the third extending part231 and is fixed in the second mounting bolt hole 131, thereby realizingthe fixed connection between the second end plate 230 and the third wall130.

As shown in FIG. 11 , the second end plate 230 may further include afourth extending part 232, the fourth extending part 232 extends towardthe third wall 130 and abuts the third wall 130, and the fourthextending part 232 and the third extending part 231 are spaced apart inthe up-down direction. By providing the fourth extending part 232,connection points between the second end plate 230 and the third wall130 in the up-down direction are increased, and reliability of theconnection between the second end plate 230 and the third wall 130 isimproved.

The fourth extending part 232 may be located either above the thirdextending part 231 or below the third extending part 231, which is notlimited in the embodiments of the present application. Optionally, inthe embodiment shown in FIG. 11 , the fourth extending part 232 islocated below the third extending part 231.

Optionally, as shown in FIG. 11 , the fourth extending part 232 may bemultiple in quantity, and the multiple fourth extending parts 232 arearranged at intervals in the up-down direction.

As shown in FIG. 3 and FIG. 9 , in an embodiment of the presentapplication, the box body 100 further includes a pair of fourth walls140, the pair of fourth walls 140 are both connected to the first wall110 and extend upward, the pair of fourth walls 140 are disposedopposite to each other along a second direction A2, and the seconddirection A2 intersects with the first direction A1. Optionally, asshown in FIG. 9 , the second direction A2 may be perpendicular to thefirst direction A1, and the second direction A2 is the length directionof the first end plate 220.

In the embodiments shown in FIG. 1 to FIG. 10 , the interior of the boxbody 100 are partitioned by middle beams into two spaces for mountingthe battery modules 200, and two battery modules 200 are arranged alongthe first direction A1. It should be noted that the number of batterymodules 200 in the first direction A1 is not limited in otherembodiments of the present application. For example, as shown in FIG. 11, no middle beam is disposed in the box body 100, and only one batterymodule 200 is disposed in the first direction A1.

As shown in FIG. 13 to FIG. 15 , in another embodiment of the presentapplication, the first end plate 220 further includes a second elasticsupport part 225, and the second elastic support part 225 is configuredto abut the fourth wall 140 to realize locating of the battery module200 in the second direction A2. For this reason, after the batterymodule 200 is mounted in the box body 100, the second elastic supportpart 225 abuts the fourth wall 140, which could provide mountinglocating in the second direction A2 for the battery module 200, andensures the reliability of the mounting of the battery module 200 in thesecond direction A2.

Here, when the battery cell arrangement structure 210 does not expand,the second elastic support part 225 abuts the fourth wall 140, which maymean that the second elastic support part 225 is exactly in contact withthe fourth wall 140 and the second elastic support part 225 is in anunreformed state, or mean that the second elastic support part 225 abutson the fourth wall 140 and is in a deformed state, which is not limitedin the embodiments of the present application.

Optionally, in an embodiment of the present application, the batterymodule 200 is in an interference fit with the box body 100, and thesecond elastic support part 225 is configured to absorb a magnitude ofinterference in the second direction A2 through generation of elasticdeformation. That is, in this embodiment, when the battery cellarrangement structure 210 does not expand, the second elastic supportpart 225 abuts on the fourth wall 140 and is in a deformed stated. Inaddition to the advantage of providing the mounting locating in thesecond direction A2 for the battery module 200 mentioned above, thissetting has at least the following two advantages: first, after thebattery module 200 is assembled in place, the second elastic supportpart 225 provides an assembly margin in the second direction A2 for thebattery module 200, so that a dimension error of the battery module 200in the second direction A2 can be offset by the deformation of thesecond elastic support part 225. For example, when a dimension of thebattery module 200 in the second direction A2 is greater than a mountingdimension of the box body 100 in the corresponding direction, it can berealized that the battery module 200 is smoothly mounted in the box body100 through the deformation of the second elastic support part 225.Therefore, requirements on processing and assembly accuracy of thebattery module 200 in the second direction A2 are reduced. Second, afterthe battery module 200 is assembled in place, since the second elasticsupport part 225 is in a deformed state, a reaction force of the fourthwall 140 could be transferred to the battery cell arrangement structure210. The battery cells 211 are subjected to a certain pressure, which isbenefit for ensuring good contact between interfaces of positiveelectrode sheets and negative electrode sheets inside the battery cells211.

It should be noted that, in the embodiments of the present application,the above second elastic support part 225 may be disposed between thebattery module 200 and one of the fourth walls 140, that is, only oneside of the first end plate 220 is provided with the second elasticsupport part 225, or the above second elastic support parts 225 each maybe disposed between the battery module 200 and the pair of fourth walls140, that is, two opposite sides of the first end plate 220 each areprovided with the second support part 225.

Optionally, as shown in FIG. 15 , in an embodiment of the presentapplication, the second elastic support parts 225 are disposed on twoopposite sides of the end plate body 223 along the second direction A2,that is, two opposite sides of the end plate body 223 along the seconddirection A2 each are provided with the second electric support part225.

As shown in FIG. 16 , in an embodiment of the present application, atleast a portion of the second elastic support part 225 extends upwardfrom the end plate body 223 toward the fourth wall 140. In this way, theportion of the second elastic support part 225 extending upward may abutthe fourth wall 140, which realizes the mounting locating of the secondelastic support part 225 and the fourth wall 140, and the second elasticsupport part 225 obliquely extends upward, which is benefit forsqueezing the second elastic support part by the fourth wall 140 todeform.

The specific structure of the second elastic support part 225 is notlimited in the embodiments of the present application. Optionally, asshown in FIG. 17 , in an embodiment of the present application, thesecond elastic support part 225 include a first section 2251 and asecond section 2252, the first section 2251 obliquely extends upwardfrom the end plate body 223 toward the fourth wall 140, the secondsection 2252 extends upward from one end of the first section 2251 faraway from the end plate body 223, and the second section 2252 isconfigured to abut the fourth wall 140. For this reason, the firstsection 2251 is obliquely arranged upward, which could play a role of acertain guiding. The second section 2252 extends along the up-downdirection, which could form face contact with the fourth wall 140, andis beneficial to the squeeze fit between the two. Moreover, a gap isprovided between the second section 2252 and the end plate body 223,which is benefit for deforming the second section 2252 when the secondsection 2252 and the fourth wall 140 are squeezed.

In other embodiments of the present application, the second elasticsupport part 225 may be constructed as an elastic long strip extendingalong the up-down direction.

To facility the mounting of the battery module 200 in the box body 100,as shown in FIG. 16 and FIG. 17 , in an embodiment of the presentapplication, the first end plate 220 further includes a guiding part226, the guiding part 226 is located below the second elastic supportpart 225, the guiding part 226 has a inclined guiding face 2261, and theinclined guiding face 2261 is configured for guiding when the first endplate 220 is mounted in the box body 100.

To avoid the guiding part 226 to affect the normal operation of thesecond elastic support part 225, as shown in FIG. 16 , in an embodimentof the present application, a gap may be provided between the guidingpart and the fourth wall 140. In other words, as shown in FIG. 17 , theheight of the guiding part protruding from the end plate body 223 in thesecond direction A2 is smaller than the height of the second elasticsupport part 225 protruding from the end plate body 223 in the seconddirection A2.

As shown in FIG. 18 , according to another aspect of the presentapplication, a method for producing a battery is provided, for example,a method for producing the battery 10 mentioned above, and the methodincludes the following steps:

-   -   S1: providing a box body 100;    -   S2: providing a mounting plate 300;    -   S3: providing a battery module 200, the battery module 200        including a battery cell arrangement structure 210 and a first        end plate 220, the battery cell arrangement structure 210        including a plurality of battery cells 211 stacked on each        other, for example, a plurality of battery cells 211 stacked on        each other along a first direction A1; the first end plate 220        being disposed on one side of the battery cell arrangement        structure 210 and fixedly connected to the battery cell        arrangement structure 210, the first end plate 220 having a        first elastic support part 224, and the first elastic support        part 224 being configured to be capable of abutting the mounting        plate 300, being squeezed by the battery cell arrangement        structure 210 and deforming when the battery cell arrangement        structure 210 expands to provide expansion space for the battery        cell arrangement structure 210;    -   S4: fixedly connecting the mounting plate 300 to the box body        100; and    -   S5: mounting the battery module 200 in the box body 100, and        allowing the first end plate 220 to be located between the        mounting plate 300 and the battery cell arrangement structure        210.

Optionally, the battery module 200 further includes a second end plate230, the second end plate 230 is disposed on one side of the batterycell arrangement structure 210 far away from the first end plate 220,and the second end plate 230 is fixedly connected to the battery cellarrangement structure 210. In this case, the method of mounting thebattery module 200 in the box body 100 includes the following step:

placing the battery module 200 in the box body 100, and fixedlyconnecting the second end plate 230 to the box body 210.

Optionally, the mounting plate 300 is provided with a first restraintface 330, and the first restraint face 330 is configured to abut thefirst end plate 220 to limit the first end plate 220 to move upward. inthis case, the method of mounting the battery module 200 in the box body100 further includes the following steps:

applying a squeezing force to the battery module 200 to compress alength of the battery module 200;

placing the battery module 200 in a compressed state in the box body100; and

removing the squeezing force to restore the length of the battery module200, so as to move at least a portion of the first end plate 220 to abottom of the first restraint face 330. In this way, when the batterycell arrangement structure 210 expands, the first end plate 220 may abuton the first restraint face 330 to avoid the battery module 200 tofreely move upward from the box body 100.

The above fit between a first restraint protrusion 221 and a firstrestraint face 330 may be set on the first end plate 220.

It should be noted that, the features in the embodiments of the presentapplication may be mutually combined in case of no conflict.

The foregoing descriptions are only preferred embodiments of the presentapplication, and are not intended to limit the present application. Forthose skilled in the art, the present application may have variousmodifications and changes. Any modification, equivalent substitution,improvement, or the like, made within the spirit and principle of thepresent application can fall within the protection scope of the presentapplication.

What is claimed is:
 1. A battery, comprising: a box body; a battery module disposed in the box body and comprising a battery cell arrangement structure and a first end plate, the battery cell arrangement structure comprising a plurality of battery cells stacked along a first direction, the first end plate being disposed on one side of the battery cell arrangement structure, and the first end plate being fixedly connected to the battery cell arrangement structure, and the first direction being a length direction of the box body; and a mounting plate disposed between the first end plate and the box body, the mounting plate being fixedly connected to the box body; wherein the first end plate has a first elastic support part, and the first elastic support part is configured to be capable of abutting the mounting plate, being squeezed by the battery cell arrangement structure and deforming when the battery cell arrangement structure expands to provide expansion space for the battery cell arrangement structure; wherein the box body comprises a first wall and a second wall, the second wall is connected to the first wall and extends upward, the battery module is located above the first wall, and the mounting plate is disposed between the first end plate and the second wall, and the mounting plate comprises a mounting plate body and a first extending part, the first extending part extends from the mounting plate body toward the second wall, and the first extending part is fixedly connected to the second wall.
 2. The battery according to claim 1, wherein the mounting plate is connected to the second wall through a first fastener.
 3. The battery according to claim 1, wherein a restraint groove with an opening facing upward is disposed in the box body, and a lower end of the mounting plate is plugged into the restraint groove; wherein a restraint member is disposed in the box body, the restraint member has an upright part, and the restraint groove is restricted between the upright part and the second wall.
 4. The battery according to claim 1, wherein the first extending part is fixedly connected to an upper surface of the second wall.
 5. The battery according to claim 1, wherein the mounting plate further comprises a second extending part, the second extending part extends from the mounting plate body toward the second wall and abuts the second wall, and the second extending part and the first extending part are spaced apart in an up-down direction.
 6. The battery according to claim 1, wherein a height of the mounting plate is not smaller than a height of the battery cell arrangement structure, and the height of the mounting plate is greater than a height of the second wall.
 7. The battery according to claim 1, wherein at least a portion of the first elastic support part obliquely extends upward toward the mounting plate.
 8. The battery according to claim 1, wherein the box body further comprises a third wall, the third wall is connected to the first wall and extends upward, the third wall is disposed opposite to the second wall along the first direction, and the first elastic support part abuts the mounting plate when the battery cell arrangement structure does not expand to realize locating of the battery module in the first direction; wherein the battery module is in an interference fit with the box body, and the first elastic support part is configured to absorb a magnitude of interference in the first direction through generation of elastic deformation.
 9. The battery according to claim 1, wherein the box body further comprises a pair of fourth walls, the pair of fourth walls are both connected to the first wall and extend upward, the pair of fourth walls are disposed opposite to each other along a second direction, and the second direction intersects with the first direction; and the first end plate further comprises a second elastic support part, and the second elastic support part is configured to abut the fourth wall to realize locating of the battery module in the second direction.
 10. The battery according to claim 1, wherein the first end plate further comprises an end plate body, the end plate body has a first surface facing the battery cell arrangement structure and a second surface facing away from the battery cell arrangement structure, and the first elastic support part is disposed on the second surface.
 11. The battery according to claim 10, wherein an orthographic projection of the first elastic support part on a horizontal plane is in a long strip shape, a face, on which one long side of the long strip shape is located, to the second surface, and a face on which the other long side of the long strip shape is located abuts the mounting plate.
 12. The battery according to claim 10, wherein the first elastic support part is multiple in quantity, and the multiple first elastic support parts are arranged at intervals on the second surface along an up-down direction.
 13. The battery according to claim 1, wherein the battery further comprises a second end plate, the second end plate is disposed opposite to the first end plate along the first direction, the battery cell arrangement structure is located between the first end plate and the second end plate, and the second end plate is fixedly connected to both the battery cell arrangement structure and the box body.
 14. The battery according to claim 1, wherein the mounting plate is provided with a first restraint face, and the first restraint face is configured to abut the first end plate to limit the first end plate to move upward; wherein a face of the mounting plate facing the first end plate is partially recessed to form a groove, and an upper side wall of the groove is the first restraint face.
 15. The battery according to claim 14, wherein the first end plate is provided with a first restraint protrusion, and an upper surface of the first restraint protrusion is configured to abut the first restraint face to limit the first end plate to move upward; wherein the first restraint protrusion horizontally extends toward the mounting plate.
 16. The battery according to claim 15, wherein a gap is provided between the upper surface of the first restraint protrusion and the first restraint face in an up-down direction when the battery cell arrangement structure does not expand.
 17. The battery according to claim 15, wherein the first end plate further comprises an end plate body, the end plate body has a first surface facing the battery cell arrangement structure and a second surface facing away from the battery cell arrangement structure, and the first restraint protrusion is disposed on the second surface.
 18. A power consumption apparatus, comprising a battery, the battery comprising: a box body; a battery module disposed in the box body and comprising a battery cell arrangement structure and a first end plate, the battery cell arrangement structure comprising a plurality of battery cells stacked along a first direction, the first end plate being disposed on one side of the battery cell arrangement structure, and the first end plate being fixedly connected to the battery cell arrangement structure, and the first direction being a length direction of the box body; and a mounting plate disposed between the first end plate and the box body, the mounting plate being fixedly connected to the box body; wherein the first end plate has a first elastic support part, and the first elastic support part is configured to be capable of abutting the mounting plate, being squeezed by the battery cell arrangement structure and deforming when the battery cell arrangement structure expands to provide expansion space for the battery cell arrangement structure; wherein the box body comprises a first wall and a second wall, the second wall is connected to the first wall and extends upward, the battery module is located above the first wall, and the mounting plate is disposed between the first end plate and the second wall, and the mounting plate comprises a mounting plate body and a first extending part, the first extending part extends from the mounting plate body toward the second wall, and the first extending part is fixedly connected to the second wall.
 19. A method for producing a battery, wherein the method comprises: providing a box body; providing a mounting plate; providing a battery module, the battery module comprising a battery cell arrangement structure and a first end plate, the battery cell arrangement structure comprising a plurality of battery cells stacked on each other, the first end plate being disposed on one side of the battery cell arrangement structure and fixedly connected to the battery cell arrangement structure, the first end plate having a first elastic support part, and the first elastic support part being configured to be capable of abutting the mounting plate, being squeezed by the battery cell arrangement structure and deforming when the battery cell arrangement structure expands to provide expansion space for the battery cell arrangement structure, and the first direction being a length direction of the box body; fixedly connecting the mounting plate to the box body; and mounting the battery module in the box body, and allowing the first end plate to be located between the mounting plate and the battery cell arrangement structure; wherein the box body comprises a first wall and a second wall, the second wall is connected to the first wall and extends upward, the battery module is located above the first wall, and the mounting plate is disposed between the first end plate and the second wall, and the battery further comprises a second end plate, the second end plate is disposed opposite to the first end plate along the first direction, the battery cell arrangement structure is located between the first end plate and the second end plate, and the second end plate is fixedly connected to both the battery cell arrangement structure and the box body. 